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Delay discounting in suicidal behavior: Myopic preference or inconsistent valuation?

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This summary is machine-generated.

Suicidal behavior is linked to inconsistent reward valuation, not a preference for immediate rewards. This inconsistency may lead to misjudging suicide

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Behavioral Economics

Background:

  • Previous research explored the link between suicidal behavior and a preference for immediate rewards, yielding inconsistent results.
  • Alternative theories suggest that suboptimal decision-making in suicidal individuals stems from inconsistent reward valuation.

Purpose of the Study:

  • To test whether myopic preferences or inconsistent reward valuation better explains suicidal behavior.
  • To investigate group differences in decision-making using a delay discounting task.

Main Methods:

  • A delay discounting task was administered to 622 adults across four groups: suicide attempters with depression, suicide ideators with depression, nonsuicidal participants with depression, and healthy controls.
  • Multilevel models were employed to analyze valuation consistencies and reward preferences.
  • Data were collected from three distinct sites, including inpatient psychiatric units, mood disorder clinics, and primary care settings.

Main Results:

  • Significant group differences in valuation consistency were found across all samples.
  • High-lethality suicide attempters demonstrated less consistent valuation compared to other groups.
  • Group differences in immediate reward preference were minimal and not consistently observed across samples.

Conclusions:

  • Suboptimal choices in suicidal behavior are better explained by inconsistent reward valuation than by a preference for immediate gratification.
  • In suicidal crises, inconsistent valuation may lead to an inaccurate assessment of suicide's value against alternatives.
  • Findings remained robust despite controlling for cognitive function and comorbidities.